Wayne’s Workshop is always an excellent resource for how-tos that will improve your props, and in a recent video, he covers how to add a carbon pattern effect to props. This technique could also be applied to any cosplay armor for a different texture. The basis of the tutorial comes from an easy to attain material (which is something I appreciate about his videos): non-slip grip mats. You can pick those up at any box store and add a sleek finish to your props.
If you want to invest some time watching straightforward tutorial videos about props and materials, tune into Wayne’s Workshop on YouTube.